| 摘要 |
The vacuum valve comprises a valve housing (1) with an interior (2), first and second valve openings (3, 4), and a closure unit (10) that is arranged in the interior (2) of the valve housing (1) and has a first plate (11), a second plate (12), a roller support (13) which is arranged between the first plate (11) and the second plate (12), multiple roller pairs, each of which is formed from a first spreading roller (14) and a second spreading roller (15), and at least one spring (30, 31). The first and the second plate (11, 12) are carried together with the roller support (13) when the roller support (13) moves parallel to a movement direction (16) from the open position into an intermediate position, and an additional movement of the first and the second plate (11, 12) in the movement direction (16) is blocked when the roller support (13) moves from the intermediate position into a closed position. When the roller support (13) moves from the intermediate position into the closed position, the first and the second spreading roller (14, 15) are moved along rising edges (23a) of depressions (23), and the first and the second plate (11, 12) are thus spread apart parallel to a spreading direction (22). The rotational axes (28, 29) of the first and second spreading roller (14, 15) of each roller pair are offset relative to each other in the movement direction (16) and are spaced apart in the spreading direction (22) by a distance (b) which is smaller than the sum of the radius of the first spreading roller (14) and the radius of the second spreading roller (15). |
